{
  "manageEntity": {
    "action": "Save",
    "entityId": "675731372",
    "entityType": "Track",
    "nonce": "0x0ae736a40426d704f2ba0f17db67df32627418cee22bd596073d3a2fe9b417bb",
    "signature": "0x149b9d9a4438cb80582651298543864463f6462ffce949ff41c95c2b4593113959b82d6e7ff143f1e86ea67d2103ca0ae5ae41e3458ade355a03c794d0ddf3c91b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}